<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>

        .box1{
            width: 990px;
            height: 32px;
            margin: 0 auto;
            /* background-image: url('./resourse/07img/01.png');
            background-repeat: repeat-x; */
            background: url('./resourse/07img/01.png') repeat-x;
        }
        /* 图片属于外部资源，外部资源都需要浏览器单独发送请求加载
          浏览器加载外部资源，按需加载，用则加载否则不加载
          ：link 一上来就加载  :hover 和:active会在指定状态加载
         */
    </style>
</head>
<body>
    <div class="box1"></div>
</body>
</html>